schirmer



1; 0. SCHIBMEFL' AUTOMATIC REVERSING DEVICE FOR ROTARY PUMPS.

APPLICATION FILED DEC.2, I918.

1,307,602. I Patented June 24, 1919.

3 suns-sum 1.

J. O. SCHIRMER.

AUTOMATIC REVERSING DEVICE FOR ROTARY PUMPS.

APPLICATION FILED DEC.2. 1918.

1,307,602. Pa-tentedJune 24,1919.

3 SHEETSSHEET 2.

III] I HHHI 1.0. SCHIRMER.

UAUTOMAHC REVERSING DEVICE FOR ROTARY PUMPS.

APPLICATION FILED DEC-2, 1918.

Patented June 24:, 1919.

3 SHEETS-SHEET 3.

A 2mm. wlillllmum 1 WE ||||I A I To all whom itmay concern:

UNITED STATES PATENT OF C JAMES 0. scHIRMEn, or CLEVELAND, OHIO, AssIGNoR TO THE VIKING PUMP COMPANY ,OF CEDAR FALLS, IOWA, A CORPORATION. I

AUTOMATIC aEvERsrNe nnvronroa ROTARY PUMPS.

Be it known that I, JAMES O. SQH RM R, a citizen of the United States, residing at Cleveland, in the county of Cuyaho'ga and 'State of Ohio, have invented certain new and useful Improvements ingAutomatic Reversing Devices for Rotary Pumps, of which the following is a specification;

This invention relates to rotary pumps and has for its object to provide improved means for permitting the reversal of the direction of rotation of the pump without reversing the direction of flow in the ultimate discharge pipe That is to say, between thepump proper and its suction and discharge pipes, at multiple valve is provided which will automatically act to connect'the inlet to eitherside of the pump and connect the discharge to the opposite side of the pump, according to the direction of r0tation of the pump, whereby the flow in one direction is continued even if the pump is reversed.

Such aninvention is useful in many relations. For example, a reversible engine may drive a pump, as for instance the water circulating pump, the fuel pump, or the oil pump of an internal combustion engine. Certain reversible machine tools also have pumps operating in connection therewith. In these and other relations, it is desirable that the pump continually operate to pump the liquid in the same direction regardless of the direction of rotation, and the present invention accomplishes this object.

One embodiment of the inventionis illustrated in the accompanying drawings in which i y Figure 1 is an end elevation partly insection.

Fig. 2is a side elevation partly in section on the line 2+2 of Fig. 1.

Fig. 3 is a section on the line 33 of Fig. 1. I

Fig. 4 is a section on the line H of Fi.2. fieferring specifically to the drawings, 6

indicates a rotary-pump, as a whole. This may be of any suitabletype, provided, it is capable of reverse .rotation, andthe ports and passages thereto are indicated at 7 and 8 respectively, conveniently located at the top of the casing to connect with chambers in a, uedruple valve casing 9 conveniently Specification of Letters Patent. 1 Patented 'Jflne 24, 1919, Application fiiea' December 2, i918. Serial No. 264,981.

inlet opening 10 and an outlet opening 11,

which functions exist in either-direction of rotation of the pump. The inlet port 10 opens to a transversei'n'le't chamber 12, and

' the-outlet port opensfrom a transverse out-- through bonnets 14:. The valves A and C communicate with the inlet chamber 12 and the valvesB and D with the discharge'c'hamber 13. The valves C and D communicate with the port 7 and the valves A and B with the port 8, but it will be noticed that the port 7 communicates with the upper side ofthe valve 0 and with the lower side of the valve D and similarly the two opposite valves with respect to the port 8.

Assuming now that the pump is rotatin in clockwise direction in Fig. 1, the port 3 is the inlet, and the suction through the same acts to lift the valve C from its seat and fluid is drawn from the chamber 12, and the same suction tends to-hold the valve D to its seat. Passing through the pump the fiuidescapes through the port 8 and lifts the valve B and discharges into thechamber 13 and the pressure on top of the valve A holds the same closed.

- When the pump is reversed, the-suction is through the port 8, and this lifts the valve A and closes the valve B and the liquid flows in reverse direction through the pump and out through the port 7, lifting the valve D and closing the valve'G, and discharging into the chamber 13. I I

Hence the pump may be driven in. either direction but the flow through the inlet and outlet will be in the samedirection.

central position between the four valves above described.

u mean ed chereea. This casing contains an I have shown and form of this invention for the purpose of illustration, but obviously the by-pass valve may be omitted, and

the arrangement. and construction may be of the invention.

I claim: V a 1. The combination with a reversible r0- ta pump the casing of which has inlet and out et ports side by side, of a single valve casing mounted on the pump casing and modified in various ways within the scope having passages openingthrough one wallthereof to said ports, and said casing having transverse inlet and outlet chambers exof a unitary valvecasing removabl-y mounted f on top of the pump casing, said valve casing havmg passages at opposite sides ports, and k thereof communicating with sal transverse inlet and outlet chambers at op? casing, through which said valves are accesslble.

- 3. The combination with a reversible r0- tary pump the casing of which has a pair of inlet and outletvports located side by side, of a box-like valve' casin mounted on the pump casingand having passages at opposite sides thereof communicating with said ports and transverse inlet and outlet chambers at opposite ends thereof, a valve between each end of each chamber and each passage, and a central by-pass valve between said chambers, all of said valves being accessible at the top of said'valvecasing.

In testimony whereof, I do aflix my signature in'presence of two witnesses.

' JAMES O. SCHIRMER. Witnesses! JOHN A. BOMMHARDT,

W. J. MARTIN. 

